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midi.c

/* -*- tab-width: 8; c-basic-offset: 4 -*- */

/*
 * Sample MIDI Wine Driver for ALSA (basically Linux)
 *
 * Copyright 1994       Martin Ayotte
 * Copyright 1998       Luiz Otavio L. Zorzella (init procedures)
 * Copyright 1998/1999  Eric POUECH :
 *          98/7  changes for making this MIDI driver work on OSS
 *                current support is limited to MIDI ports of OSS systems
 *          98/9  rewriting MCI code for MIDI
 *          98/11       splitted in midi.c and mcimidi.c
 * Copyright 2003      Christian Costa :
 *                     ALSA port
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * TODO: Finish midi record
 *
 */

#include "config.h"

#include <string.h>
#include <stdarg.h>
#include <stdio.h>
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif
#include <fcntl.h>
#include <errno.h>

#include "windef.h"
#include "winbase.h"
#include "wingdi.h"
#include "winuser.h"
#include "winnls.h"
#include "mmddk.h"
#include "alsa.h"
#include "wine/debug.h"

WINE_DEFAULT_DEBUG_CHANNEL(midi);

#ifdef HAVE_ALSA

typedef struct {
    int                 state;                  /* -1 disabled, 0 is no recording started, 1 in recording, bit 2 set if in sys exclusive recording */
    DWORD         bufsize;
    MIDIOPENDESC  midiDesc;
    WORD          wFlags;
    LPMIDIHDR           lpQueueHdr;
    DWORD         dwTotalPlayed;
    unsigned char incoming[3];
    unsigned char incPrev;
    char          incLen;
    DWORD         startTime;
    MIDIINCAPSW         caps;
    snd_seq_addr_t      addr;
} WINE_MIDIIN;

typedef struct {
    BOOL                bEnabled;
    DWORD         bufsize;
    MIDIOPENDESC  midiDesc;
    WORD          wFlags;
    LPMIDIHDR           lpQueueHdr;
    DWORD         dwTotalPlayed;
    void*         lpExtra;          /* according to port type (MIDI, FM...), extra data when needed */
    MIDIOUTCAPSW        caps;
    snd_seq_addr_t      addr;
} WINE_MIDIOUT;

static WINE_MIDIIN      MidiInDev [MAX_MIDIINDRV ];
static WINE_MIDIOUT     MidiOutDev[MAX_MIDIOUTDRV];

/* this is the total number of MIDI out devices found (synth and port) */
static      int         MODM_NumDevs = 0;
/* this is the total number of MIDI out devices found */
static      int         MIDM_NumDevs = 0;

static      snd_seq_t*      midiSeq = NULL;
static      int         numOpenMidiSeq = 0;
static      int         numStartedMidiIn = 0;

static int port_in;
static int port_out;

static CRITICAL_SECTION crit_sect;   /* protects all MidiIn buffer queues */
static CRITICAL_SECTION_DEBUG critsect_debug =
{
    0, 0, &crit_sect,
    { &critsect_debug.ProcessLocksList, &critsect_debug.ProcessLocksList },
      0, 0, { 0, (DWORD)(__FILE__ ": crit_sect") }
};
static CRITICAL_SECTION crit_sect = { &critsect_debug, -1, 0, 0, 0, 0 };

static int end_thread;
static HANDLE hThread;

/*======================================================================*
 *                  Low level MIDI implementation                 *
 *======================================================================*/

static int midiOpenSeq(int);
static int midiCloseSeq(void);

#if 0 /* Debug Purpose */
static void error_handler(const char* file, int line, const char* function, int err, const char* fmt, ...)
{
    va_list arg;
    if (err == ENOENT)
        return;
    va_start(arg, fmt);
    fprintf(stderr, "ALSA lib %s:%i:(%s) ", file, line, function);
    vfprintf(stderr, fmt, arg);
    if (err)
        fprintf(stderr, ": %s", snd_strerror(err));
    putc('\n', stderr);
    va_end(arg);
}
#endif

/**************************************************************************
 *                MIDI_unixToWindowsDeviceType              [internal]
 *
 * return the Windows equivalent to a Unix Device Type
 *
 */
static      int   MIDI_AlsaToWindowsDeviceType(int type)
{
    /* MOD_MIDIPORT     output port
     * MOD_SYNTH        generic internal synth
     * MOD_SQSYNTH      square wave internal synth
     * MOD_FMSYNTH      FM internal synth
     * MOD_MAPPER       MIDI mapper
     * MOD_WAVETABLE    hardware watetable internal synth
     * MOD_SWSYNTH      software internal synth
     */

    /* FIXME Is this really the correct equivalence from ALSA to
       Windows Sound type */

    if (type & SND_SEQ_PORT_TYPE_SYNTH)
        return MOD_FMSYNTH;

    if (type & (SND_SEQ_PORT_TYPE_DIRECT_SAMPLE|SND_SEQ_PORT_TYPE_SAMPLE))
        return MOD_SYNTH;

    if (type & SND_SEQ_PORT_TYPE_MIDI_GENERIC)
        return MOD_MIDIPORT;
    
    ERR("Cannot determine the type of this midi device. Assuming FM Synth\n");
    return MOD_FMSYNTH;
}

/**************************************************************************
 *                MIDI_NotifyClient             [internal]
 */
static DWORD MIDI_NotifyClient(UINT wDevID, WORD wMsg,
                         DWORD dwParam1, DWORD dwParam2)
{
    DWORD         dwCallBack;
    UINT          uFlags;
    HANDLE        hDev;
    DWORD         dwInstance;

    TRACE("wDevID = %04X wMsg = %d dwParm1 = %04lX dwParam2 = %04lX\n",
        wDevID, wMsg, dwParam1, dwParam2);

    switch (wMsg) {
    case MOM_OPEN:
    case MOM_CLOSE:
    case MOM_DONE:
    case MOM_POSITIONCB:
      if (wDevID > MODM_NumDevs)
          return MMSYSERR_BADDEVICEID;

      dwCallBack = MidiOutDev[wDevID].midiDesc.dwCallback;
      uFlags = MidiOutDev[wDevID].wFlags;
      hDev = MidiOutDev[wDevID].midiDesc.hMidi;
      dwInstance = MidiOutDev[wDevID].midiDesc.dwInstance;
      break;

    case MIM_OPEN:
    case MIM_CLOSE:
    case MIM_DATA:
    case MIM_LONGDATA:
    case MIM_ERROR:
    case MIM_LONGERROR:
    case MIM_MOREDATA:
      if (wDevID > MIDM_NumDevs)
          return MMSYSERR_BADDEVICEID;

      dwCallBack = MidiInDev[wDevID].midiDesc.dwCallback;
      uFlags = MidiInDev[wDevID].wFlags;
      hDev = MidiInDev[wDevID].midiDesc.hMidi;
      dwInstance = MidiInDev[wDevID].midiDesc.dwInstance;
      break;
    default:
      WARN("Unsupported MSW-MIDI message %u\n", wMsg);
      return MMSYSERR_ERROR;
    }

    return DriverCallback(dwCallBack, uFlags, hDev, wMsg, dwInstance, dwParam1, dwParam2) ?
      0 : MMSYSERR_ERROR;
}

static int midi_warn = 1;
/**************************************************************************
 *                midiOpenSeq                   [internal]
 */
static int midiOpenSeq(int create_client)
{
    if (numOpenMidiSeq == 0) {
      if (snd_seq_open(&midiSeq, "default", SND_SEQ_OPEN_DUPLEX, 0) < 0)
        {
          if (midi_warn)
          {
            WARN("Error opening ALSA sequencer.\n");
          }
          midi_warn = 0;
          return -1;
      }

      if (create_client) {
          /* Setting the client name is the only init to do */
          snd_seq_set_client_name(midiSeq, "WINE midi driver");

#if 0 /* FIXME: Is it possible to use a port for READ & WRITE ops */
            port_in = port_out = snd_seq_create_simple_port(midiSeq, "WINE ALSA Input/Output", SND_SEQ_PORT_CAP_READ|SND_SEQ_PORT_CAP_WRITE,
                                                                         SND_SEQ_PORT_TYPE_APPLICATION);
            if (port_out < 0)
               TRACE("Unable to create output port\n");
            else
             TRACE("Outport port created successfully (%d)\n", port_out);
#else
            port_out = snd_seq_create_simple_port(midiSeq, "WINE ALSA Output", SND_SEQ_PORT_CAP_READ,
                                                                         SND_SEQ_PORT_TYPE_APPLICATION);
          if (port_out < 0)
            TRACE("Unable to create output port\n");
          else
            TRACE("Outport port created successfully (%d)\n", port_out);

          port_in = snd_seq_create_simple_port(midiSeq, "WINE ALSA Input", SND_SEQ_PORT_CAP_WRITE,
                                                                       SND_SEQ_PORT_TYPE_APPLICATION);
            if (port_in < 0)
                TRACE("Unable to create input port\n");
            else
              TRACE("Input port created successfully (%d)\n", port_in);
#endif
       }
    }
    numOpenMidiSeq++;
    return 0;
}

/**************************************************************************
 *                midiCloseSeq                        [internal]
 */
static int midiCloseSeq(void)
{
    if (--numOpenMidiSeq == 0) {
      snd_seq_delete_simple_port(midiSeq, port_out);
      snd_seq_delete_simple_port(midiSeq, port_in);
      snd_seq_close(midiSeq);
      midiSeq = NULL;
    }
    return 0;
}

static DWORD WINAPI midRecThread(LPVOID arg)
{
    int npfd;
    struct pollfd *pfd;

    TRACE("Thread startup\n");

    while(!end_thread) {
      TRACE("Thread loop\n");
      npfd = snd_seq_poll_descriptors_count(midiSeq, POLLIN);
      pfd = (struct pollfd *)HeapAlloc(GetProcessHeap(), 0, npfd * sizeof(struct pollfd));
      snd_seq_poll_descriptors(midiSeq, pfd, npfd, POLLIN);

      /* Check if a event is present */
      if (poll(pfd, npfd, 250) < 0) {
          HeapFree(GetProcessHeap(), 0, pfd);
          continue;
      }

      /* Note: This definitely does not work.  
       * while(snd_seq_event_input_pending(midiSeq, 0) > 0) {
             snd_seq_event_t* ev;
             snd_seq_event_input(midiSeq, &ev);
             ....................
             snd_seq_free_event(ev);
         }*/

      do {
          WORD wDevID;
          snd_seq_event_t* ev;
          snd_seq_event_input(midiSeq, &ev);
          /* Find the target device */
          for (wDevID = 0; wDevID < MIDM_NumDevs; wDevID++)
            if ( (ev->source.client == MidiInDev[wDevID].addr.client) && (ev->source.port == MidiInDev[wDevID].addr.port) )
                break;
          if ((wDevID == MIDM_NumDevs) || (MidiInDev[wDevID].state != 1))
            FIXME("Unexpected event received, type = %x from %d:%d\n", ev->type, ev->source.client, ev->source.port);
          else {
            DWORD dwTime, toSend = 0;
            /* FIXME: Should use ev->time instead for better accuracy */
            dwTime = GetTickCount() - MidiInDev[wDevID].startTime;
            TRACE("Event received, type = %x, device = %d\n", ev->type, wDevID);
            switch(ev->type)
            {
            case SND_SEQ_EVENT_NOTEOFF:
                toSend = (ev->data.note.velocity << 16) | (ev->data.note.note << 8) | MIDI_CMD_NOTE_OFF | ev->data.control.channel;
                break;
            case SND_SEQ_EVENT_NOTEON:
                toSend = (ev->data.note.velocity << 16) | (ev->data.note.note << 8) | MIDI_CMD_NOTE_ON | ev->data.control.channel;
                break;
            case SND_SEQ_EVENT_KEYPRESS:
                toSend = (ev->data.note.velocity << 16) | (ev->data.note.note << 8) | MIDI_CMD_NOTE_PRESSURE | ev->data.control.channel;
                break;
            case SND_SEQ_EVENT_CONTROLLER: 
                toSend = (ev->data.control.value << 16) | (ev->data.control.param << 8) | MIDI_CMD_CONTROL | ev->data.control.channel;
                break;
            case SND_SEQ_EVENT_PITCHBEND:
                toSend = (ev->data.control.value << 16) | (ev->data.control.param << 8) | MIDI_CMD_BENDER | ev->data.control.channel;
                break;
            case SND_SEQ_EVENT_PGMCHANGE:
                toSend = (ev->data.control.value << 16) | (ev->data.control.param << 8) | MIDI_CMD_PGM_CHANGE | ev->data.control.channel;
                break;
            case SND_SEQ_EVENT_CHANPRESS:
                toSend = (ev->data.control.value << 16) | (ev->data.control.param << 8) | MIDI_CMD_CHANNEL_PRESSURE | ev->data.control.channel;
                break;
            case SND_SEQ_EVENT_SYSEX:
                {
                  int len = ev->data.ext.len;
                  LPBYTE ptr = (BYTE*) ev->data.ext.ptr;
                  LPMIDIHDR lpMidiHdr;

                  /* FIXME: Should handle sysex greater that a single buffer */
                  EnterCriticalSection(&crit_sect);
                  if ((lpMidiHdr = MidiInDev[wDevID].lpQueueHdr) != NULL) {
                      if (len <= lpMidiHdr->dwBufferLength) {
                        lpMidiHdr->dwBytesRecorded = len;
                        memcpy(lpMidiHdr->lpData, ptr, len);
                        lpMidiHdr->dwFlags &= ~MHDR_INQUEUE;
                        lpMidiHdr->dwFlags |= MHDR_DONE;
                        MidiInDev[wDevID].lpQueueHdr = (LPMIDIHDR)lpMidiHdr->lpNext;
                        if (MIDI_NotifyClient(wDevID, MIM_LONGDATA, (DWORD)lpMidiHdr, dwTime) != MMSYSERR_NOERROR)
                            WARN("Couldn't notify client\n");
                      } else
                        FIXME("No enough space in the buffer to store sysex!\n");
                  } else
                      FIXME("Sysex received but no buffer to store it!\n");
                  LeaveCriticalSection(&crit_sect);
                }
                break;
            case SND_SEQ_EVENT_SENSING:
                /* Noting to do */
                break;
            default:
                FIXME("Unhandled event received, type = %x\n", ev->type);
                break;
            }
            if (toSend != 0) {
                TRACE("Sending event %08lx (from %d %d)\n", toSend, ev->source.client, ev->source.port);
                if (MIDI_NotifyClient(wDevID, MIM_DATA, toSend, dwTime) != MMSYSERR_NOERROR) {
                  WARN("Couldn't notify client\n");
                }
            }
          }
          snd_seq_free_event(ev);
      } while(snd_seq_event_input_pending(midiSeq, 0) > 0);
      
      HeapFree(GetProcessHeap(), 0, pfd);
    }
    return 0;
}

/**************************************************************************
 *                      midGetDevCaps                 [internal]
 */
static DWORD midGetDevCaps(WORD wDevID, LPMIDIINCAPSW lpCaps, DWORD dwSize)
{
    TRACE("(%04X, %p, %08lX);\n", wDevID, lpCaps, dwSize);

    if (wDevID >= MIDM_NumDevs) return MMSYSERR_BADDEVICEID;
    if (lpCaps == NULL)       return MMSYSERR_INVALPARAM;

    memcpy(lpCaps, &MidiInDev[wDevID].caps, min(dwSize, sizeof(*lpCaps)));

    return MMSYSERR_NOERROR;
}


/**************************************************************************
 *                midOpen                             [internal]
 */
static DWORD midOpen(WORD wDevID, LPMIDIOPENDESC lpDesc, DWORD dwFlags)
{
    TRACE("(%04X, %p, %08lX);\n", wDevID, lpDesc, dwFlags);

    if (lpDesc == NULL) {
      WARN("Invalid Parameter !\n");
      return MMSYSERR_INVALPARAM;
    }

    /* FIXME :
     *      how to check that content of lpDesc is correct ?
     */
    if (wDevID >= MIDM_NumDevs) {
      WARN("wDevID too large (%u) !\n", wDevID);
      return MMSYSERR_BADDEVICEID;
    }
    if (MidiInDev[wDevID].state == -1) {        
        WARN("device disabled\n");
        return MIDIERR_NODEVICE;
    }
    if (MidiInDev[wDevID].midiDesc.hMidi != 0) {
      WARN("device already open !\n");
      return MMSYSERR_ALLOCATED;
    }
    if ((dwFlags & MIDI_IO_STATUS) != 0) {
      WARN("No support for MIDI_IO_STATUS in dwFlags yet, ignoring it\n");
      dwFlags &= ~MIDI_IO_STATUS;
    }
    if ((dwFlags & ~CALLBACK_TYPEMASK) != 0) {
      FIXME("Bad dwFlags\n");
      return MMSYSERR_INVALFLAG;
    }

    if (midiOpenSeq(1) < 0) {
      return MMSYSERR_ERROR;
    }

    /* Connect our app port to the device port */
    if (snd_seq_connect_from(midiSeq, port_in, MidiInDev[wDevID].addr.client, MidiInDev[wDevID].addr.port) < 0)
      return MMSYSERR_NOTENABLED;

    TRACE("input port connected %d %d %d\n",port_in,MidiInDev[wDevID].addr.client,MidiInDev[wDevID].addr.port);

    if (numStartedMidiIn++ == 0) {
      end_thread = 0;
      hThread = CreateThread(NULL, 0, midRecThread, NULL, 0, NULL);
      if (!hThread) {
          numStartedMidiIn = 0;
          WARN("Couldn't create thread for midi-in\n");
          midiCloseSeq();
          return MMSYSERR_ERROR;
      }
      TRACE("Created thread for midi-in\n");
    }

    MidiInDev[wDevID].wFlags = HIWORD(dwFlags & CALLBACK_TYPEMASK);

    MidiInDev[wDevID].lpQueueHdr = NULL;
    MidiInDev[wDevID].dwTotalPlayed = 0;
    MidiInDev[wDevID].bufsize = 0x3FFF;
    MidiInDev[wDevID].midiDesc = *lpDesc;
    MidiInDev[wDevID].state = 0;
    MidiInDev[wDevID].incLen = 0;
    MidiInDev[wDevID].startTime = 0;

    if (MIDI_NotifyClient(wDevID, MIM_OPEN, 0L, 0L) != MMSYSERR_NOERROR) {
      WARN("can't notify client !\n");
      return MMSYSERR_INVALPARAM;
    }
    return MMSYSERR_NOERROR;
}

/**************************************************************************
 *                midClose                      [internal]
 */
static DWORD midClose(WORD wDevID)
{
    int           ret = MMSYSERR_NOERROR;

    TRACE("(%04X);\n", wDevID);

    if (wDevID >= MIDM_NumDevs) {
      WARN("wDevID too big (%u) !\n", wDevID);
      return MMSYSERR_BADDEVICEID;
    }
    if (MidiInDev[wDevID].midiDesc.hMidi == 0) {
      WARN("device not opened !\n");
      return MMSYSERR_ERROR;
    }
    if (MidiInDev[wDevID].lpQueueHdr != 0) {
      return MIDIERR_STILLPLAYING;
    }

    if (midiSeq == NULL) {
      WARN("ooops !\n");
      return MMSYSERR_ERROR;
    }
    if (--numStartedMidiIn == 0) {
      TRACE("Stopping thread for midi-in\n");
      end_thread = 1;
      if (WaitForSingleObject(hThread, 5000) != WAIT_OBJECT_0) {
          WARN("Thread end not signaled, force termination\n");
          TerminateThread(hThread, 0);
      }
      TRACE("Stopped thread for midi-in\n");
    }

    snd_seq_disconnect_from(midiSeq, port_in, MidiInDev[wDevID].addr.client, MidiInDev[wDevID].addr.port);
    midiCloseSeq();

    MidiInDev[wDevID].bufsize = 0;
    if (MIDI_NotifyClient(wDevID, MIM_CLOSE, 0L, 0L) != MMSYSERR_NOERROR) {
      WARN("can't notify client !\n");
      ret = MMSYSERR_INVALPARAM;
    }
    MidiInDev[wDevID].midiDesc.hMidi = 0;

    return ret;
}


/**************************************************************************
 *                      midAddBuffer                  [internal]
 */
static DWORD midAddBuffer(WORD wDevID, LPMIDIHDR lpMidiHdr, DWORD dwSize)
{
    TRACE("(%04X, %p, %08lX);\n", wDevID, lpMidiHdr, dwSize);

    if (wDevID >= MIDM_NumDevs) return MMSYSERR_BADDEVICEID;
    if (MidiInDev[wDevID].state == -1) return MIDIERR_NODEVICE;

    if (lpMidiHdr == NULL)    return MMSYSERR_INVALPARAM;
    if (sizeof(MIDIHDR) > dwSize) return MMSYSERR_INVALPARAM;
    if (lpMidiHdr->dwBufferLength == 0) return MMSYSERR_INVALPARAM;
    if (lpMidiHdr->dwFlags & MHDR_INQUEUE) return MIDIERR_STILLPLAYING;
    if (!(lpMidiHdr->dwFlags & MHDR_PREPARED)) return MIDIERR_UNPREPARED;

    EnterCriticalSection(&crit_sect);
    if (MidiInDev[wDevID].lpQueueHdr == 0) {
      MidiInDev[wDevID].lpQueueHdr = lpMidiHdr;
    } else {
      LPMIDIHDR   ptr;

      for (ptr = MidiInDev[wDevID].lpQueueHdr;
           ptr->lpNext != 0;
           ptr = (LPMIDIHDR)ptr->lpNext);
      ptr->lpNext = (struct midihdr_tag*)lpMidiHdr;
    }
    LeaveCriticalSection(&crit_sect);

    return MMSYSERR_NOERROR;
}

/**************************************************************************
 *                      midPrepare              [internal]
 */
static DWORD midPrepare(WORD wDevID, LPMIDIHDR lpMidiHdr, DWORD dwSize)
{
    TRACE("(%04X, %p, %08lX);\n", wDevID, lpMidiHdr, dwSize);

    if (dwSize < sizeof(MIDIHDR) || lpMidiHdr == 0 ||
      lpMidiHdr->lpData == 0 || (lpMidiHdr->dwFlags & MHDR_INQUEUE) != 0 ||
      lpMidiHdr->dwBufferLength >= 0x10000ul)
      return MMSYSERR_INVALPARAM;

    lpMidiHdr->lpNext = 0;
    lpMidiHdr->dwFlags |= MHDR_PREPARED;
    lpMidiHdr->dwBytesRecorded = 0;

    return MMSYSERR_NOERROR;
}

/**************************************************************************
 *                      midUnprepare                  [internal]
 */
static DWORD midUnprepare(WORD wDevID, LPMIDIHDR lpMidiHdr, DWORD dwSize)
{
    TRACE("(%04X, %p, %08lX);\n", wDevID, lpMidiHdr, dwSize);

    if (wDevID >= MIDM_NumDevs) return MMSYSERR_BADDEVICEID;
    if (MidiInDev[wDevID].state == -1) return MIDIERR_NODEVICE;

    if (dwSize < sizeof(MIDIHDR) || lpMidiHdr == 0 ||
      lpMidiHdr->lpData == 0 || lpMidiHdr->dwBufferLength >= 0x10000ul)
      return MMSYSERR_INVALPARAM;

    if (!(lpMidiHdr->dwFlags & MHDR_PREPARED)) return MIDIERR_UNPREPARED;
    if (lpMidiHdr->dwFlags & MHDR_INQUEUE) return MIDIERR_STILLPLAYING;

    lpMidiHdr->dwFlags &= ~MHDR_PREPARED;

    return MMSYSERR_NOERROR;
}

/**************************************************************************
 *                midReset                      [internal]
 */
static DWORD midReset(WORD wDevID)
{
    DWORD         dwTime = GetTickCount();

    TRACE("(%04X);\n", wDevID);

    if (wDevID >= MIDM_NumDevs) return MMSYSERR_BADDEVICEID;
    if (MidiInDev[wDevID].state == -1) return MIDIERR_NODEVICE;

    EnterCriticalSection(&crit_sect);
    while (MidiInDev[wDevID].lpQueueHdr) {
      MidiInDev[wDevID].lpQueueHdr->dwFlags &= ~MHDR_INQUEUE;
      MidiInDev[wDevID].lpQueueHdr->dwFlags |= MHDR_DONE;
      /* FIXME: when called from 16 bit, lpQueueHdr needs to be a segmented ptr */
      if (MIDI_NotifyClient(wDevID, MIM_LONGDATA,
                        (DWORD)MidiInDev[wDevID].lpQueueHdr, dwTime) != MMSYSERR_NOERROR) {
          WARN("Couldn't notify client\n");
      }
      MidiInDev[wDevID].lpQueueHdr = (LPMIDIHDR)MidiInDev[wDevID].lpQueueHdr->lpNext;
    }
    LeaveCriticalSection(&crit_sect);

    return MMSYSERR_NOERROR;
}

/**************************************************************************
 *                midStart                      [internal]
 */
static DWORD midStart(WORD wDevID)
{
    TRACE("(%04X);\n", wDevID);

    if (wDevID >= MIDM_NumDevs) return MMSYSERR_BADDEVICEID;
    if (MidiInDev[wDevID].state == -1) return MIDIERR_NODEVICE;

    MidiInDev[wDevID].state = 1;
    MidiInDev[wDevID].startTime = GetTickCount();
    return MMSYSERR_NOERROR;
}

/**************************************************************************
 *                midStop                             [internal]
 */
static DWORD midStop(WORD wDevID)
{
    TRACE("(%04X);\n", wDevID);

    if (wDevID >= MIDM_NumDevs) return MMSYSERR_BADDEVICEID;
    if (MidiInDev[wDevID].state == -1) return MIDIERR_NODEVICE;

    MidiInDev[wDevID].state = 0;
    return MMSYSERR_NOERROR;
}

/**************************************************************************
 *                      modGetDevCaps                 [internal]
 */
static DWORD modGetDevCaps(WORD wDevID, LPMIDIOUTCAPSW lpCaps, DWORD dwSize)
{
    TRACE("(%04X, %p, %08lX);\n", wDevID, lpCaps, dwSize);

    if (wDevID >= MODM_NumDevs)     return MMSYSERR_BADDEVICEID;
    if (lpCaps == NULL)       return MMSYSERR_INVALPARAM;

    memcpy(lpCaps, &MidiOutDev[wDevID].caps, min(dwSize, sizeof(*lpCaps)));

    return MMSYSERR_NOERROR;
}

/**************************************************************************
 *                modOpen                             [internal]
 */
static DWORD modOpen(WORD wDevID, LPMIDIOPENDESC lpDesc, DWORD dwFlags)
{
    TRACE("(%04X, %p, %08lX);\n", wDevID, lpDesc, dwFlags);
    if (lpDesc == NULL) {
      WARN("Invalid Parameter !\n");
      return MMSYSERR_INVALPARAM;
    }
    if (wDevID >= MODM_NumDevs) {
      TRACE("MAX_MIDIOUTDRV reached !\n");
      return MMSYSERR_BADDEVICEID;
    }
    if (MidiOutDev[wDevID].midiDesc.hMidi != 0) {
      WARN("device already open !\n");
      return MMSYSERR_ALLOCATED;
    }
    if (!MidiOutDev[wDevID].bEnabled) {
      WARN("device disabled !\n");
      return MIDIERR_NODEVICE;
    }
    if ((dwFlags & ~CALLBACK_TYPEMASK) != 0) {
      WARN("bad dwFlags\n");
      return MMSYSERR_INVALFLAG;
    }
    if (!MidiOutDev[wDevID].bEnabled) {
      TRACE("disabled wDevID\n");
      return MMSYSERR_NOTENABLED;
    }

    MidiOutDev[wDevID].lpExtra = 0;

    switch (MidiOutDev[wDevID].caps.wTechnology) {
    case MOD_FMSYNTH:
    case MOD_MIDIPORT:
    case MOD_SYNTH:
      if (midiOpenSeq(1) < 0) {
          return MMSYSERR_ALLOCATED;
      }
      break;
    default:
      WARN("Technology not supported (yet) %d !\n",
           MidiOutDev[wDevID].caps.wTechnology);
      return MMSYSERR_NOTENABLED;
    }

    MidiOutDev[wDevID].wFlags = HIWORD(dwFlags & CALLBACK_TYPEMASK);

    MidiOutDev[wDevID].lpQueueHdr = NULL;
    MidiOutDev[wDevID].dwTotalPlayed = 0;
    MidiOutDev[wDevID].bufsize = 0x3FFF;
    MidiOutDev[wDevID].midiDesc = *lpDesc;

    /* Connect our app port to the device port */
    if (snd_seq_connect_to(midiSeq, port_out, MidiOutDev[wDevID].addr.client, MidiOutDev[wDevID].addr.port) < 0)
      return MMSYSERR_NOTENABLED;
    
    if (MIDI_NotifyClient(wDevID, MOM_OPEN, 0L, 0L) != MMSYSERR_NOERROR) {
      WARN("can't notify client !\n");
      return MMSYSERR_INVALPARAM;
    }
    TRACE("Successful !\n");
    return MMSYSERR_NOERROR;
}


/**************************************************************************
 *                modClose                      [internal]
 */
static DWORD modClose(WORD wDevID)
{
    int     ret = MMSYSERR_NOERROR;

    TRACE("(%04X);\n", wDevID);

    if (MidiOutDev[wDevID].midiDesc.hMidi == 0) {
      WARN("device not opened !\n");
      return MMSYSERR_ERROR;
    }
    /* FIXME: should test that no pending buffer is still in the queue for
     * playing */

    if (midiSeq == NULL) {
      WARN("can't close !\n");
      return MMSYSERR_ERROR;
    }

    switch (MidiOutDev[wDevID].caps.wTechnology) {
    case MOD_FMSYNTH:
    case MOD_MIDIPORT:
    case MOD_SYNTH:
        snd_seq_disconnect_to(midiSeq, port_out, MidiOutDev[wDevID].addr.client, MidiOutDev[wDevID].addr.port);
      midiCloseSeq();
      break;
    default:
      WARN("Technology not supported (yet) %d !\n",
           MidiOutDev[wDevID].caps.wTechnology);
      return MMSYSERR_NOTENABLED;
    }

    HeapFree(GetProcessHeap(), 0, MidiOutDev[wDevID].lpExtra);
    MidiOutDev[wDevID].lpExtra = 0;
 
    MidiOutDev[wDevID].bufsize = 0;
    if (MIDI_NotifyClient(wDevID, MOM_CLOSE, 0L, 0L) != MMSYSERR_NOERROR) {
      WARN("can't notify client !\n");
      ret = MMSYSERR_INVALPARAM;
    }
    MidiOutDev[wDevID].midiDesc.hMidi = 0;
    return ret;
}

/**************************************************************************
 *                modData                             [internal]
 */
static DWORD modData(WORD wDevID, DWORD dwParam)
{
    BYTE    evt = LOBYTE(LOWORD(dwParam));
    BYTE    d1  = HIBYTE(LOWORD(dwParam));
    BYTE    d2  = LOBYTE(HIWORD(dwParam));
    
    TRACE("(%04X, %08lX);\n", wDevID, dwParam);

    if (wDevID >= MODM_NumDevs) return MMSYSERR_BADDEVICEID;
    if (!MidiOutDev[wDevID].bEnabled) return MIDIERR_NODEVICE;

    if (midiSeq == NULL) {
      WARN("can't play !\n");
      return MIDIERR_NODEVICE;
    }
    switch (MidiOutDev[wDevID].caps.wTechnology) {
    case MOD_SYNTH:
    case MOD_MIDIPORT:
      {
          int handled = 1; /* Assume event is handled */
            snd_seq_event_t event;
            snd_seq_ev_clear(&event);
            snd_seq_ev_set_direct(&event);
            snd_seq_ev_set_source(&event, port_out);
            snd_seq_ev_set_dest(&event, MidiOutDev[wDevID].addr.client, MidiOutDev[wDevID].addr.port);
          
          switch (evt & 0xF0) {
          case MIDI_CMD_NOTE_OFF:
            snd_seq_ev_set_noteoff(&event, evt&0x0F, d1, d2);
            break;
          case MIDI_CMD_NOTE_ON:
            snd_seq_ev_set_noteon(&event, evt&0x0F, d1, d2);
            break;
          case MIDI_CMD_NOTE_PRESSURE:
            snd_seq_ev_set_keypress(&event, evt&0x0F, d1, d2);
            break;
          case MIDI_CMD_CONTROL:
            snd_seq_ev_set_controller(&event, evt&0x0F, d1, d2);
            break;
          case MIDI_CMD_BENDER:
            snd_seq_ev_set_pitchbend(&event, evt&0x0F, ((WORD)d1 << 7) | (WORD)d2);
            break;
          case MIDI_CMD_PGM_CHANGE:
            snd_seq_ev_set_pgmchange(&event, evt&0x0F, d1);
            break;
          case MIDI_CMD_CHANNEL_PRESSURE:
            snd_seq_ev_set_chanpress(&event, evt&0x0F, d1);
            break;
          case MIDI_CMD_COMMON_SYSEX:
            switch (evt & 0x0F) {
            case 0x00:  /* System Exclusive, don't do it on modData,
                         * should require modLongData*/
            case 0x01:  /* Undefined */
            case 0x04:  /* Undefined. */
            case 0x05:  /* Undefined. */
            case 0x07:  /* End of Exclusive. */
            case 0x09:  /* Undefined. */
            case 0x0D:  /* Undefined. */
                handled = 0;
                break;
            case 0x06:  /* Tune Request */
            case 0x08:  /* Timing Clock. */
            case 0x0A:  /* Start. */
            case 0x0B:  /* Continue */
            case 0x0C:  /* Stop */
            case 0x0E:  /* Active Sensing. */
                /* FIXME: Is this function suitable for these purposes
                   (and also Song Select and Song Position Pointer) */
                  snd_seq_ev_set_sysex(&event, 1, &evt);
                break;
            case 0x0F:  /* Reset */
                        /* snd_seq_ev_set_sysex(&event, 1, &evt);
                           this other way may be better */
                {
                  BYTE reset_sysex_seq[] = {MIDI_CMD_COMMON_SYSEX, 0x7e, 0x7f, 0x09, 0x01, 0xf7};
                  snd_seq_ev_set_sysex(&event, sizeof(reset_sysex_seq), reset_sysex_seq);
                }
                break;
            case 0x03:  /* Song Select. */
                {
                  BYTE buf[2];
                  buf[0] = evt;
                  buf[1] = d1;
                  snd_seq_ev_set_sysex(&event, sizeof(buf), buf);
                  }
                  break;
            case 0x02:  /* Song Position Pointer. */
                {
                  BYTE buf[3];
                  buf[0] = evt;
                  buf[1] = d1;
                  buf[2] = d2;
                  snd_seq_ev_set_sysex(&event, sizeof(buf), buf);
                  }
                break;
            }
            break;
          }
          if (handled)
                snd_seq_event_output_direct(midiSeq, &event);
      }
      break;
    default:
      WARN("Technology not supported (yet) %d !\n",
           MidiOutDev[wDevID].caps.wTechnology);
      return MMSYSERR_NOTENABLED;
    }

    return MMSYSERR_NOERROR;
}

/**************************************************************************
 *          modLongData                         [internal]
 */
static DWORD modLongData(WORD wDevID, LPMIDIHDR lpMidiHdr, DWORD dwSize)
{
    int           len_add = 0;
    LPBYTE  lpData, lpNewData = NULL;
    snd_seq_event_t event;

    TRACE("(%04X, %p, %08lX);\n", wDevID, lpMidiHdr, dwSize);

    /* Note: MS doc does not say much about the dwBytesRecorded member of the MIDIHDR structure
     * but it seems to be used only for midi input.
     * Taking a look at the WAVEHDR structure (which is quite similar) confirms this assumption.
     */
    
    if (wDevID >= MODM_NumDevs) return MMSYSERR_BADDEVICEID;
    if (!MidiOutDev[wDevID].bEnabled) return MIDIERR_NODEVICE;

    if (midiSeq == NULL) {
      WARN("can't play !\n");
      return MIDIERR_NODEVICE;
    }

    lpData = lpMidiHdr->lpData;
    
    if (lpData == NULL)
      return MIDIERR_UNPREPARED;
    if (!(lpMidiHdr->dwFlags & MHDR_PREPARED))
      return MIDIERR_UNPREPARED;
    if (lpMidiHdr->dwFlags & MHDR_INQUEUE)
      return MIDIERR_STILLPLAYING;
    lpMidiHdr->dwFlags &= ~MHDR_DONE;
    lpMidiHdr->dwFlags |= MHDR_INQUEUE;

    /* FIXME: MS doc is not 100% clear. Will lpData only contain system exclusive
     * data, or can it also contain raw MIDI data, to be split up and sent to
     * modShortData() ?
     * If the latest is true, then the following WARNing will fire up
     */
    if (lpData[0] != 0xF0 || lpData[lpMidiHdr->dwBufferLength - 1] != 0xF7) {
      WARN("Alledged system exclusive buffer is not correct\n\tPlease report with MIDI file\n");
      lpNewData = HeapAlloc(GetProcessHeap(), 0, lpMidiHdr->dwBufferLength + 2);
    }

    TRACE("dwBufferLength=%lu !\n", lpMidiHdr->dwBufferLength);
    TRACE("                 %02X %02X %02X ... %02X %02X %02X\n",
        lpData[0], lpData[1], lpData[2], lpData[lpMidiHdr->dwBufferLength-3],
        lpData[lpMidiHdr->dwBufferLength-2], lpData[lpMidiHdr->dwBufferLength-1]);

    switch (MidiOutDev[wDevID].caps.wTechnology) {
    case MOD_FMSYNTH:
      /* FIXME: I don't think there is much to do here */
      break;
    case MOD_MIDIPORT:
      if (lpData[0] != 0xF0) {
          /* Send start of System Exclusive */
          len_add = 1;
          lpData[0] = 0xF0;
          memcpy(lpNewData, lpData, lpMidiHdr->dwBufferLength);
          WARN("Adding missing 0xF0 marker at the beginning of "
             "system exclusive byte stream\n");
      }
      if (lpData[lpMidiHdr->dwBufferLength-1] != 0xF7) {
          /* Send end of System Exclusive */
          memcpy(lpData + len_add, lpData, lpMidiHdr->dwBufferLength);
            lpNewData[lpMidiHdr->dwBufferLength + len_add - 1] = 0xF0;
          len_add++;
          WARN("Adding missing 0xF7 marker at the end of "
             "system exclusive byte stream\n");
      }
      snd_seq_ev_clear(&event);
      snd_seq_ev_set_direct(&event);
      snd_seq_ev_set_source(&event, port_out);
      snd_seq_ev_set_dest(&event, MidiOutDev[wDevID].addr.client, MidiOutDev[wDevID].addr.port);
      TRACE("client = %d port = %d\n", MidiOutDev[wDevID].addr.client, MidiOutDev[wDevID].addr.port);
      snd_seq_ev_set_sysex(&event, lpMidiHdr->dwBufferLength + len_add, lpNewData ? lpNewData : lpData);
      snd_seq_event_output_direct(midiSeq, &event);
      if (lpNewData)
            HeapFree(GetProcessHeap(), 0, lpData);
      break;
    default:
      WARN("Technology not supported (yet) %d !\n",
           MidiOutDev[wDevID].caps.wTechnology);
      return MMSYSERR_NOTENABLED;
    }

    lpMidiHdr->dwFlags &= ~MHDR_INQUEUE;
    lpMidiHdr->dwFlags |= MHDR_DONE;
    if (MIDI_NotifyClient(wDevID, MOM_DONE, (DWORD)lpMidiHdr, 0L) != MMSYSERR_NOERROR) {
      WARN("can't notify client !\n");
      return MMSYSERR_INVALPARAM;
    }
    return MMSYSERR_NOERROR;
}

/**************************************************************************
 *                modPrepare                    [internal]
 */
static DWORD modPrepare(WORD wDevID, LPMIDIHDR lpMidiHdr, DWORD dwSize)
{
    TRACE("(%04X, %p, %08lX);\n", wDevID, lpMidiHdr, dwSize);

    if (midiSeq == NULL) {
      WARN("can't prepare !\n");
      return MMSYSERR_NOTENABLED;
    }

    /* MS doc says that dwFlags must be set to zero, but (kinda funny) MS mciseq drivers
     * asks to prepare MIDIHDR which dwFlags != 0.
     * So at least check for the inqueue flag
     */
    if (dwSize < sizeof(MIDIHDR) || lpMidiHdr == 0 ||
      lpMidiHdr->lpData == 0 || (lpMidiHdr->dwFlags & MHDR_INQUEUE) != 0 ||
      lpMidiHdr->dwBufferLength >= 0x10000ul) {
      WARN("%p %p %08lx %d/%ld\n", lpMidiHdr, lpMidiHdr->lpData,
                 lpMidiHdr->dwFlags, sizeof(MIDIHDR), dwSize);
      return MMSYSERR_INVALPARAM;
    }

    lpMidiHdr->lpNext = 0;
    lpMidiHdr->dwFlags |= MHDR_PREPARED;
    lpMidiHdr->dwFlags &= ~MHDR_DONE;
    return MMSYSERR_NOERROR;
}

/**************************************************************************
 *                      modUnprepare                  [internal]
 */
static DWORD modUnprepare(WORD wDevID, LPMIDIHDR lpMidiHdr, DWORD dwSize)
{
    TRACE("(%04X, %p, %08lX);\n", wDevID, lpMidiHdr, dwSize);

    if (midiSeq == NULL) {
      WARN("can't unprepare !\n");
      return MMSYSERR_NOTENABLED;
    }

    if (dwSize < sizeof(MIDIHDR) || lpMidiHdr == 0)
      return MMSYSERR_INVALPARAM;
    if (lpMidiHdr->dwFlags & MHDR_INQUEUE)
      return MIDIERR_STILLPLAYING;
    lpMidiHdr->dwFlags &= ~MHDR_PREPARED;
    return MMSYSERR_NOERROR;
}

/**************************************************************************
 *                modReset                      [internal]
 */
static DWORD modReset(WORD wDevID)
{
    unsigned chn;

    TRACE("(%04X);\n", wDevID);

    if (wDevID >= MODM_NumDevs) return MMSYSERR_BADDEVICEID;
    if (!MidiOutDev[wDevID].bEnabled) return MIDIERR_NODEVICE;

    /* stop all notes */
    /* FIXME: check if 0x78B0 is channel dependent or not. I coded it so that
     * it's channel dependent...
     */
    for (chn = 0; chn < 16; chn++) {
      /* turn off every note */
      modData(wDevID, 0x7800 | MIDI_CMD_CONTROL | chn);
      /* remove sustain on all channels */
      modData(wDevID, (MIDI_CTL_SUSTAIN << 8) | MIDI_CMD_CONTROL | chn);
    }
    /* FIXME: the LongData buffers must also be returned to the app */
    return MMSYSERR_NOERROR;
}


/**************************************************************************
 *                      ALSA_AddMidiPort              [internal]
 *
 * Helper for ALSA_MidiInit
 */
static void ALSA_AddMidiPort(snd_seq_client_info_t* cinfo, snd_seq_port_info_t* pinfo, int cap, int type)
{
    if (cap & SND_SEQ_PORT_CAP_WRITE) {
      TRACE("OUT (%d:%s:%s:%d:%s:%x)\n",snd_seq_client_info_get_client(cinfo),
                                snd_seq_client_info_get_name(cinfo),
                                snd_seq_client_info_get_type(cinfo) == SND_SEQ_USER_CLIENT ? "user" : "kernel",
                                snd_seq_port_info_get_port(pinfo),
                                snd_seq_port_info_get_name(pinfo),
                                type);
            
      if (MODM_NumDevs >= MAX_MIDIOUTDRV)
          return;
      if (!type)
            return;

      memcpy(&MidiOutDev[MODM_NumDevs].addr, snd_seq_port_info_get_addr(pinfo), sizeof(snd_seq_addr_t));
            
      /* Manufac ID. We do not have access to this with soundcard.h
       * Does not seem to be a problem, because in mmsystem.h only
       * Microsoft's ID is listed.
       */
      MidiOutDev[MODM_NumDevs].caps.wMid = 0x00FF;
      MidiOutDev[MODM_NumDevs].caps.wPid = 0x0001;    /* FIXME Product ID  */
      /* Product Version. We simply say "1" */
      MidiOutDev[MODM_NumDevs].caps.vDriverVersion = 0x001;
      MidiOutDev[MODM_NumDevs].caps.wChannelMask   = 0xFFFF;

      /* FIXME Do we have this information?
       * Assuming the soundcards can handle
       * MIDICAPS_VOLUME and MIDICAPS_LRVOLUME but
       * not MIDICAPS_CACHE.
       */
      MidiOutDev[MODM_NumDevs].caps.dwSupport      = MIDICAPS_VOLUME|MIDICAPS_LRVOLUME;
      MultiByteToWideChar(CP_ACP, 0, snd_seq_client_info_get_name(cinfo), -1,
                            MidiOutDev[MODM_NumDevs].caps.szPname,
                            sizeof(MidiOutDev[MODM_NumDevs].caps.szPname) / sizeof(WCHAR));

      MidiOutDev[MODM_NumDevs].caps.wTechnology = MIDI_AlsaToWindowsDeviceType(type);
      MidiOutDev[MODM_NumDevs].caps.wVoices     = 16;

        /* FIXME Is it possible to know the maximum
         * number of simultaneous notes of a soundcard ?
         * I believe we don't have this information, but
         * it's probably equal or more than wVoices
         */
      MidiOutDev[MODM_NumDevs].caps.wNotes = 16;
      MidiOutDev[MODM_NumDevs].bEnabled    = TRUE;

      TRACE("MidiOut[%d]\tname='%s' techn=%d voices=%d notes=%d chnMsk=%04x support=%ld\n"
          "\tALSA info: midi dev-type=%lx, capa=%lx\n",
              MODM_NumDevs, wine_dbgstr_w(MidiOutDev[MODM_NumDevs].caps.szPname),
              MidiOutDev[MODM_NumDevs].caps.wTechnology,
              MidiOutDev[MODM_NumDevs].caps.wVoices, MidiOutDev[MODM_NumDevs].caps.wNotes,
              MidiOutDev[MODM_NumDevs].caps.wChannelMask, MidiOutDev[MODM_NumDevs].caps.dwSupport,
              (long)type, (long)0);
            
      MODM_NumDevs++;
    }
    if (cap & SND_SEQ_PORT_CAP_READ) {
        TRACE("IN  (%d:%s:%s:%d:%s:%x)\n",snd_seq_client_info_get_client(cinfo),
                                    snd_seq_client_info_get_name(cinfo),
                                snd_seq_client_info_get_type(cinfo) == SND_SEQ_USER_CLIENT ? "user" : "kernel",
                                snd_seq_port_info_get_port(pinfo),
                                snd_seq_port_info_get_name(pinfo),
                                type);
            
      if (MIDM_NumDevs >= MAX_MIDIINDRV)
          return;
      if (!type)
          return;

      memcpy(&MidiInDev[MIDM_NumDevs].addr, snd_seq_port_info_get_addr(pinfo), sizeof(snd_seq_addr_t));
            
      /* Manufac ID. We do not have access to this with soundcard.h
       * Does not seem to be a problem, because in mmsystem.h only
       * Microsoft's ID is listed.
       */
      MidiInDev[MIDM_NumDevs].caps.wMid = 0x00FF;
      MidiInDev[MIDM_NumDevs].caps.wPid = 0x0001;     /* FIXME Product ID  */
      /* Product Version. We simply say "1" */
      MidiInDev[MIDM_NumDevs].caps.vDriverVersion = 0x001;

      /* FIXME Do we have this information?
       * Assuming the soundcards can handle
       * MIDICAPS_VOLUME and MIDICAPS_LRVOLUME but
       * not MIDICAPS_CACHE.
       */
      MidiInDev[MIDM_NumDevs].caps.dwSupport      = MIDICAPS_VOLUME|MIDICAPS_LRVOLUME;
      MultiByteToWideChar(CP_ACP, 0, snd_seq_client_info_get_name(cinfo), -1,
                            MidiInDev[MIDM_NumDevs].caps.szPname,
                            sizeof(MidiInDev[MIDM_NumDevs].caps.szPname) / sizeof(WCHAR));
      MidiInDev[MIDM_NumDevs].state = 0;

      TRACE("MidiIn [%d]\tname='%s' support=%ld\n"
              "\tALSA info: midi dev-type=%lx, capa=%lx\n",
              MIDM_NumDevs, wine_dbgstr_w(MidiInDev[MIDM_NumDevs].caps.szPname),
              MidiInDev[MIDM_NumDevs].caps.dwSupport,
              (long)type, (long)0);

      MIDM_NumDevs++;
    }
}

#endif /* HAVE_ALSA */


/*======================================================================*
 *                          MIDI entry points                     *
 *======================================================================*/

/**************************************************************************
 * ALSA_MidiInit                    [internal]
 *
 * Initializes the MIDI devices information variables
 */
LONG ALSA_MidiInit(void)
{
#ifdef HAVE_ALSA
    static  BOOL  bInitDone = FALSE;
    snd_seq_client_info_t *cinfo;
    snd_seq_port_info_t *pinfo;

    if (bInitDone)
      return TRUE;

    TRACE("Initializing the MIDI variables.\n");
    bInitDone = TRUE;

    /* try to open device */
    if (midiOpenSeq(0) == -1) {
      return TRUE;
    }

#if 0 /* Debug purpose */
    snd_lib_error_set_handler(error_handler);
#endif
    
    snd_seq_client_info_alloca(&cinfo);
    snd_seq_port_info_alloca(&pinfo);

    /* First, search for all internal midi devices */
    snd_seq_client_info_set_client(cinfo, -1);
    while(snd_seq_query_next_client(midiSeq, cinfo) >= 0) {
        snd_seq_port_info_set_client(pinfo, snd_seq_client_info_get_client(cinfo));
      snd_seq_port_info_set_port(pinfo, -1);
      while (snd_seq_query_next_port(midiSeq, pinfo) >= 0) {
            int cap = snd_seq_port_info_get_capability(pinfo);
          int type = snd_seq_port_info_get_type(pinfo);
          if (type != SND_SEQ_PORT_TYPE_MIDI_GENERIC)
              ALSA_AddMidiPort(cinfo, pinfo, cap, type);
      }
    }

    /* Second, search for all external ports */
    snd_seq_client_info_set_client(cinfo, -1);
    while(snd_seq_query_next_client(midiSeq, cinfo) >= 0) {
        snd_seq_port_info_set_client(pinfo, snd_seq_client_info_get_client(cinfo));
      snd_seq_port_info_set_port(pinfo, -1);
      while (snd_seq_query_next_port(midiSeq, pinfo) >= 0) {
            int cap = snd_seq_port_info_get_capability(pinfo);
          int type = snd_seq_port_info_get_type(pinfo);
          if (type == SND_SEQ_PORT_TYPE_MIDI_GENERIC)
              ALSA_AddMidiPort(cinfo, pinfo, cap, type);
      }
    }

    /* close file and exit */
    midiCloseSeq();

    TRACE("End\n");
#endif
    return TRUE;
}

/**************************************************************************
 *                midMessage (WINEOSS.4)
 */
DWORD WINAPI ALSA_midMessage(UINT wDevID, UINT wMsg, DWORD dwUser,
                      DWORD dwParam1, DWORD dwParam2)
{
    TRACE("(%04X, %04X, %08lX, %08lX, %08lX);\n",
        wDevID, wMsg, dwUser, dwParam1, dwParam2);
    switch (wMsg) {
#ifdef HAVE_ALSA
    case DRVM_INIT:
    case DRVM_EXIT:
    case DRVM_ENABLE:
    case DRVM_DISABLE:
      /* FIXME: Pretend this is supported */
      return 0;
    case MIDM_OPEN:
      return midOpen(wDevID, (LPMIDIOPENDESC)dwParam1, dwParam2);
    case MIDM_CLOSE:
      return midClose(wDevID);
    case MIDM_ADDBUFFER:
      return midAddBuffer(wDevID, (LPMIDIHDR)dwParam1, dwParam2);
    case MIDM_PREPARE:
      return midPrepare(wDevID, (LPMIDIHDR)dwParam1, dwParam2);
    case MIDM_UNPREPARE:
      return midUnprepare(wDevID, (LPMIDIHDR)dwParam1, dwParam2);
    case MIDM_GETDEVCAPS:
      return midGetDevCaps(wDevID, (LPMIDIINCAPSW)dwParam1,dwParam2);
    case MIDM_GETNUMDEVS:
      return MIDM_NumDevs;
    case MIDM_RESET:
      return midReset(wDevID);
    case MIDM_START:
      return midStart(wDevID);
    case MIDM_STOP:
      return midStop(wDevID);
#endif
    default:
      TRACE("Unsupported message\n");
    }
    return MMSYSERR_NOTSUPPORTED;
}

/**************************************************************************
 *                      modMessage (WINEOSS.5)
 */
DWORD WINAPI ALSA_modMessage(UINT wDevID, UINT wMsg, DWORD dwUser,
                      DWORD dwParam1, DWORD dwParam2)
{
    TRACE("(%04X, %04X, %08lX, %08lX, %08lX);\n",
        wDevID, wMsg, dwUser, dwParam1, dwParam2);

    switch (wMsg) {
#ifdef HAVE_ALSA
    case DRVM_INIT:
    case DRVM_EXIT:
    case DRVM_ENABLE:
    case DRVM_DISABLE:
      /* FIXME: Pretend this is supported */
      return 0;
    case MODM_OPEN:
      return modOpen(wDevID, (LPMIDIOPENDESC)dwParam1, dwParam2);
    case MODM_CLOSE:
      return modClose(wDevID);
    case MODM_DATA:
      return modData(wDevID, dwParam1);
    case MODM_LONGDATA:
      return modLongData(wDevID, (LPMIDIHDR)dwParam1, dwParam2);
    case MODM_PREPARE:
      return modPrepare(wDevID, (LPMIDIHDR)dwParam1, dwParam2);
    case MODM_UNPREPARE:
      return modUnprepare(wDevID, (LPMIDIHDR)dwParam1, dwParam2);
    case MODM_GETDEVCAPS:
      return modGetDevCaps(wDevID, (LPMIDIOUTCAPSW)dwParam1, dwParam2);
    case MODM_GETNUMDEVS:
      return MODM_NumDevs;
    case MODM_GETVOLUME:
      return 0;
    case MODM_SETVOLUME:
      return 0;
    case MODM_RESET:
      return modReset(wDevID);
#endif
    default:
      TRACE("Unsupported message\n");
    }
    return MMSYSERR_NOTSUPPORTED;
}

/*-----------------------------------------------------------------------*/

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